US5778706A - Marine propeller anti-theft device - Google Patents
Marine propeller anti-theft device Download PDFInfo
- Publication number
- US5778706A US5778706A US08/884,127 US88412797A US5778706A US 5778706 A US5778706 A US 5778706A US 88412797 A US88412797 A US 88412797A US 5778706 A US5778706 A US 5778706A
- Authority
- US
- United States
- Prior art keywords
- cap
- clevis
- propeller
- clevis component
- theft device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000009434 installation Methods 0.000 claims description 6
- 230000002452 interceptive effect Effects 0.000 claims description 4
- 230000000717 retained effect Effects 0.000 claims description 4
- 230000001360 synchronised effect Effects 0.000 claims description 4
- 230000000712 assembly Effects 0.000 abstract description 3
- 238000000429 assembly Methods 0.000 abstract description 3
- 238000010276 construction Methods 0.000 description 2
- 241001236140 Meroles Species 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000007373 indentation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63J—AUXILIARIES ON VESSELS
- B63J99/00—Subject matter not provided for in other groups of this subclass
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B73/00—Devices for locking portable objects against unauthorised removal; Miscellaneous locking devices
- E05B73/007—Devices for locking portable objects against unauthorised removal; Miscellaneous locking devices for boats, surfboards or parts or accessories thereof
- E05B73/0076—Devices for locking portable objects against unauthorised removal; Miscellaneous locking devices for boats, surfboards or parts or accessories thereof outboard motors or propellers
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T70/00—Locks
- Y10T70/40—Portable
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T70/00—Locks
- Y10T70/40—Portable
- Y10T70/402—Fetters
- Y10T70/409—Shackles
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T70/00—Locks
- Y10T70/50—Special application
- Y10T70/5009—For portable articles
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T70/00—Locks
- Y10T70/50—Special application
- Y10T70/5611—For control and machine elements
- Y10T70/5854—Bolt, nut, stud, stud-cap
- Y10T70/5867—Encased
Definitions
- the present invention relates to a device for preventing theft of a marine propeller mounted on an outboard engine of a boat.
- the device engages a housing enclosing the driveline of the outboard engine, and obstructs access to a nut securing the propeller to a driven shaft.
- the engine assembly generally comprises an internal combustion engine, a series of driven shafts, a housing enclosing the engine and shafts, and an exposed propeller.
- the propeller typically is mounted onto the final shaft by threading, and is secured thereto by a nut.
- Propellers are readily replaced, as is frequently required due to damage arising from unintended contacts with submerged rocks, by removing the nut.
- the present invention comprises a yoke fabricated from rod stock which slips over the front of the shaft housing, and obstructs access to the nut by a cap. No close fit of the present invention is required for installation, as is generally required by the prior art devices.
- the present invention provides a two part, telescoping yoke which adjusts in length to slip over an outboard engine housing at the propeller. Being fabricated from rod stock, the yoke is more resistant to being sawed or otherwise severed to gain unauthorized access to the critical nut. The device is also more economically fabricated than are the prior art devices requiring complicated configuration of a sheet material. One end of the yoke has a stout enlarged head or cap for obstructing access to the nut. No close fit or cooperation with the shaft housing is required to secure the yoke to the outboard engine.
- Two embodiments enable locking either by an integral, key operated cylinder or by a separate conventional padlock. Only minimal precision is required to place the novel anti-theft device in place on the outboard engine, adjust it, and lock it in an operable position.
- a chain or the like may be attached to the device when installed on an outboard engine, and secured at its other end to a fixed object. This arrangement prevents theft of the lower portion of the outboard engine by partial disassembly of the outboard engine.
- Still another object of the invention is to enable locking by padlock.
- An additional object of the invention is to provide the novel anti-theft device with an integral lock.
- Yet another object of the invention is to provide a stout member for obstructing access to the nut securing the propeller to its shaft.
- FIG. 1 is an exploded, top plan view of the invention.
- FIG. 2 is an environmental, top plan view of the invention installed on an outboard engine assembly.
- FIG. 3 is an exploded, perspective detail view of components of a lock, taken from the lower part of FIG. 1, shown partly in cross section.
- FIG. 4 is a perspective detail view illustrating a component shown at the left of FIG. 3, rotated to a different position.
- FIG. 5 is an exploded perspective detail view of components shown at the top left of FIG. 1.
- FIG. 6 is a top plan detail view of the invention, illustrating an alternative embodiment employing a hasp, and showing a padlock usable with the hasp.
- FIGS. 1 and 2 of the drawings wherein the invention is shown installed in FIG. 2, the novel anti-theft device 10 is seen to comprise two principal components.
- One is a clevis component 12 for engaging the lower portion 2 (see FIG. 2) of the shaft housing of an outboard engine assembly (not shown in its entirety).
- the other major components complement clevis component 12, completing partial encirclement of the shaft housing.
- These other components are a cap 14 which will obstruct access to a propeller nut 6 securing propeller assembly 4 on its shaft 8 (outboard engine components are shown in FIG. 2), and a connection member 16 connecting cap 14 to clevis component 12 in spaced apart relationship.
- Clevis component 12 has left and right lateral members 18, 20, and an end member 22.
- members 18, 20, 22 partially encircle or surround the front of lower portion 2 of the outboard engine assembly.
- Members 18 and 20 also define a clevis center line 24 disposed centrally between and parallel to members 18 and 20.
- the clevis formed by members 18, 20, and 22 opens to the rear, towards cap 14, so that clevis component 12 is slipped over lower portion 2 of the shaft housing from the front thereof.
- Cap 14 is slipped over propeller assembly 4 from the rear thereof, and is joined to clevis component 12 by connection member 16.
- Connection member 16 both secures cap 14 to clevis component 12, and also maintains face 26 of cap 14 oriented towards clevis component 12.
- Anti-theft device 10 is adjustable as to its overall length, length being parallel to center line 24. This adjustment, indicated generally by arrow 28, determines magnitude of a dimension by which cap 14 will be spaced apart from clevis component 12 after installation of device 10 on an outboard engine assembly (see FIG. 2).
- Adjustment apparatus is incorporated into clevis component 12 and connection member 16.
- Clevis component 12 has an arm or inner member 30 fixed rigidly thereto, which penetrates a guide 32 fixed rigidly to connection member 16.
- Inner member 30 is slidably retained within guide 32 and is constrained to slide parallel to clevis center line 24.
- cap 14 and connection member 16 are placed over propeller assembly 4 and inner member 30 is simultaneously inserted into guide 32. Clevis member 12 and connection member 16 are then drawn together until the outboard engine is firmly clamped between clevis member 12 and cap 14.
- a lock is provided for locking cap 14 in a selected fixed spatial relation with respect to clevis component 12 in the clamped position.
- the lock comprises a key operated cylinder lock 34 mounted on connection member 16.
- lock 34 is seen to have a semi-cylindrical finger 36 which rotates as indicated by arrows 38 responsively to turning of a key 40 for operating lock 34 into a locked position.
- Finger 36 may be aligned with any one of several cooperating indentations or grooves 42 (see FIG. 1) formed along inner member 30.
- Lock 34 is arranged so that in one position, finger 36 occupies a groove 42, thereby providing an interfering member which selectively engages one groove 42.
- finger 36 rotates out of engagement with all grooves 42, thereby freeing inner member 30 to slide along guide 32.
- clevis component 12 is installed on, removed from, and adjusted with respect to lower portion 2 of the shaft housing.
- FIG. 2 illustrates anti-theft device 10 installed on lower portion 2 of the shaft housing.
- clevis component 12 is shown adjusted relative to connection member 16, with cap 14 firmly clamping propeller assembly 4 and lower portion 2 of the shaft housing against clevis component 12.
- Cap 14 is seen to have a plurality of projections 46 which project from face 26 of cap 14 and pass between two adjacent blades 9. This feature of cap 14 assists in preventing synchronous rotation of propeller assembly 4 and cap 14, thus precluding unauthorized operation of the outboard engine assembly.
- cap 14 may either be integrally formed with connection member 16, or may be a separate component. In the latter case, as illustrated throughout the drawings, cap 14 is preferably prevented from rotating relative to connection member 16, whereby installation of anti-theft device 10 on an outboard engine both obstructs access to propeller nut 6 and also prevents propeller assembly 4 from rotating on its shaft 8.
- connection member with a hexagonal tang 48 which cooperatingly interfits within a hexagonal socket 50 formed in cap 14.
- cap 14 could be formed integrally with connection member 16.
- separate construction is preferred since rotational adjustment for conforming to propeller position may be desirable.
- the locking arrangement may comprise a hasp 52 solidly fixed to guide 32 for accepting the staple 54 of an external padlock 56, rather than incorporating an integral lock such as lock 34 of FIG. 1. This enables ready changing of the keying combination, should this become desirable for any reason, or replacement of the lock, if required.
- guide 32 and locking components may be formed as part of clevis component 12, with grooves 42 being formed in connection member 16.
- cap 14 may be constrained against rotation relative to connection member 16 in other ways, such as by providing a pin (not shown) arranged to penetrate aligned holes (not shown) formed in cap 14 and tang 48.
- tang 48 may be formed merely by bending the rod stock of connection member 16. The tang and its associated socket formed in cap 14 thus would not need be hexagonal or of any other configuration which is not circular in cross section, for preventing rotation.
- lock 34 may be a combination type lock, rather than being operated by a separate key, or still another type of lock.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Lock And Its Accessories (AREA)
Abstract
Description
Claims (9)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/884,127 US5778706A (en) | 1997-06-27 | 1997-06-27 | Marine propeller anti-theft device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/884,127 US5778706A (en) | 1997-06-27 | 1997-06-27 | Marine propeller anti-theft device |
Publications (1)
Publication Number | Publication Date |
---|---|
US5778706A true US5778706A (en) | 1998-07-14 |
Family
ID=25384014
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US08/884,127 Expired - Fee Related US5778706A (en) | 1997-06-27 | 1997-06-27 | Marine propeller anti-theft device |
Country Status (1)
Country | Link |
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US (1) | US5778706A (en) |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5884509A (en) * | 1998-02-06 | 1999-03-23 | Leboeuf; Anthony | Propeller lock |
US5887460A (en) * | 1997-09-12 | 1999-03-30 | Williams; Terry L | Propeller security device |
US5927108A (en) * | 1998-05-18 | 1999-07-27 | Pierce; Carl W. | Wheel lock |
WO2000036312A1 (en) * | 1998-12-16 | 2000-06-22 | Lawman Armor Corporation | Marine propeller anti-theft device |
US6298696B2 (en) | 1997-10-10 | 2001-10-09 | Robert A. Vito | Anti-theft brake or clutch pedal locking device |
US6519981B1 (en) * | 2001-12-26 | 2003-02-18 | Edward Lovak | Anti-theft device for a lower unit of an outboard engine and stern drive |
USRE38951E1 (en) | 1997-10-10 | 2006-01-31 | Unbreakable Company | Anti-theft brake or clutch locking device |
USRE39248E1 (en) | 1997-10-10 | 2006-08-29 | Unbreakable Company | Anti-theft brake locking device |
US20060272365A1 (en) * | 2005-06-06 | 2006-12-07 | Copus Gary D | Multipurpose Portable Lock |
US9266501B2 (en) | 2012-08-16 | 2016-02-23 | Bean Brothers Llc | Seat lock device and methods |
Citations (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2362323A (en) * | 1943-05-12 | 1944-11-07 | Leonard A Stoppel | Combined weed guard and trolling plate for outboard motors |
US2822183A (en) * | 1955-03-18 | 1958-02-04 | William H Montgomery | Wheeled propeller sheath |
US3759076A (en) * | 1971-12-13 | 1973-09-18 | J Reese | Marine propeller lock |
US3981165A (en) * | 1976-03-17 | 1976-09-21 | Wersinger Merol O | Outboard motor propeller lock system |
US4257247A (en) * | 1978-08-07 | 1981-03-24 | Sims Gary F | Boat propellor security device |
US4715783A (en) * | 1986-12-12 | 1987-12-29 | Wade Mark W | Theft-proofing device for outboard motor propellers |
US4760719A (en) * | 1986-12-22 | 1988-08-02 | Evans Daniel S | Non-key locking cable lock for marine vessel |
US5176550A (en) * | 1989-09-29 | 1993-01-05 | Hooper Robert P | Engine propeller blade and lower unit protector |
US5184488A (en) * | 1991-09-09 | 1993-02-09 | Anthony Cilbilich | Marine outdrive locking system |
US5417093A (en) * | 1993-11-04 | 1995-05-23 | Heiberg; Martin D. | Propeller lock |
US5469721A (en) * | 1994-03-25 | 1995-11-28 | Pyle; Stephen K. | Boat propeller case and lock |
US5613386A (en) * | 1995-10-06 | 1997-03-25 | Mire, Sr.; Jerry D. | Security lock for propeller |
-
1997
- 1997-06-27 US US08/884,127 patent/US5778706A/en not_active Expired - Fee Related
Patent Citations (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2362323A (en) * | 1943-05-12 | 1944-11-07 | Leonard A Stoppel | Combined weed guard and trolling plate for outboard motors |
US2822183A (en) * | 1955-03-18 | 1958-02-04 | William H Montgomery | Wheeled propeller sheath |
US3759076A (en) * | 1971-12-13 | 1973-09-18 | J Reese | Marine propeller lock |
US3981165A (en) * | 1976-03-17 | 1976-09-21 | Wersinger Merol O | Outboard motor propeller lock system |
US4257247A (en) * | 1978-08-07 | 1981-03-24 | Sims Gary F | Boat propellor security device |
US4715783A (en) * | 1986-12-12 | 1987-12-29 | Wade Mark W | Theft-proofing device for outboard motor propellers |
US4760719A (en) * | 1986-12-22 | 1988-08-02 | Evans Daniel S | Non-key locking cable lock for marine vessel |
US5176550A (en) * | 1989-09-29 | 1993-01-05 | Hooper Robert P | Engine propeller blade and lower unit protector |
US5184488A (en) * | 1991-09-09 | 1993-02-09 | Anthony Cilbilich | Marine outdrive locking system |
US5417093A (en) * | 1993-11-04 | 1995-05-23 | Heiberg; Martin D. | Propeller lock |
US5469721A (en) * | 1994-03-25 | 1995-11-28 | Pyle; Stephen K. | Boat propeller case and lock |
US5613386A (en) * | 1995-10-06 | 1997-03-25 | Mire, Sr.; Jerry D. | Security lock for propeller |
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5887460A (en) * | 1997-09-12 | 1999-03-30 | Williams; Terry L | Propeller security device |
US6298696B2 (en) | 1997-10-10 | 2001-10-09 | Robert A. Vito | Anti-theft brake or clutch pedal locking device |
US6463772B2 (en) | 1997-10-10 | 2002-10-15 | Robert A. Vito | Anti-theft brake or clutch pedal locking device |
USRE38951E1 (en) | 1997-10-10 | 2006-01-31 | Unbreakable Company | Anti-theft brake or clutch locking device |
USRE39248E1 (en) | 1997-10-10 | 2006-08-29 | Unbreakable Company | Anti-theft brake locking device |
US5884509A (en) * | 1998-02-06 | 1999-03-23 | Leboeuf; Anthony | Propeller lock |
US5927108A (en) * | 1998-05-18 | 1999-07-27 | Pierce; Carl W. | Wheel lock |
WO2000036312A1 (en) * | 1998-12-16 | 2000-06-22 | Lawman Armor Corporation | Marine propeller anti-theft device |
US6519981B1 (en) * | 2001-12-26 | 2003-02-18 | Edward Lovak | Anti-theft device for a lower unit of an outboard engine and stern drive |
US20060272365A1 (en) * | 2005-06-06 | 2006-12-07 | Copus Gary D | Multipurpose Portable Lock |
US7377135B2 (en) | 2005-06-06 | 2008-05-27 | Copus Gary D | Multipurpose portable lock |
US9266501B2 (en) | 2012-08-16 | 2016-02-23 | Bean Brothers Llc | Seat lock device and methods |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: LASALLE BANK NATIONAL ASSOCIATION, ILLINOIS Free format text: SECURITY INTEREST;ASSIGNOR:LAWMAN ARMOR CORPORATION;REEL/FRAME:011806/0059 Effective date: 20010509 |
|
FPAY | Fee payment |
Year of fee payment: 4 |
|
AS | Assignment |
Owner name: TRILLIUM HOLDINGS, L.L.C., ILLINOIS Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:LASALLE BANK NATIONAL ASSOCIATION;REEL/FRAME:014321/0346 Effective date: 20030616 |
|
REMI | Maintenance fee reminder mailed | ||
AS | Assignment |
Owner name: UNBREAKABLE LOCK COMPANY, PENNSYLVANIA Free format text: TERMINATION OF INTEREST;ASSIGNOR:TRILLIUM HOLDINGS, L.L.C.;REEL/FRAME:017458/0667 Effective date: 20000107 |
|
LAPS | Lapse for failure to pay maintenance fees | ||
STCH | Information on status: patent discontinuation |
Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362 |
|
FP | Expired due to failure to pay maintenance fee |
Effective date: 20060714 |